3028/ (Set : B) P. T. O.

CLASS : 12th Sr. Sec. (Academic) Code No. 3028

Series : SS-M/2016

Roll No.

Yeeweflekeâ efJe%eeve

PHYSICS

[ Hindi and English Medium ]

ACADEMIC

2nd SEMESTER

(Only for Fresh/Re-appear Candidates)

Evening Session

Time allowed : 2½ hours ] [ Maximum Marks : 60

• ke=âheÙee peeBÛe keâj ueW efkeâ Fme ØeMve-he$e ceW cegefõle he=‰ 15 leLee ØeMve 18 nQ~

Please make sure that the printed pages in thisquestion paper are 15 in number and it contains 18questions.

• ØeMve-he$e cebs oeefnves neLe keâer Deesj efoÙes ieÙes k eâes[ vec yej leLee mesš keâes Úe$eGòej-hegefmlekeâe kesâ cegKÙe-he=‰ hej efueKeW~

The Code No. and Set on the right side of thequestion paper should be written by the candidateon the front page of the answer-book.

• ke=âheÙee ØeMve keâe Gòej efueKevee Meg™ keâjves mes henues, ØeMve keâe ›eâceebkeâ DeJeMÙeefueKeW~

Before beginning to answer a question, its SerialNumber must be written.

SET : B

HBSE Class 12 Physics Question Paper 2016 Semester 2 Set B

(2) 3028/ (Set : B)

3028/ (Set : B)

• Gòej-hegefmlekeâe kesâ yeerÛe ceW Keeueer hevvee/hevves ve ÚesÌ[W~

Don’t leave blank page / pages in your answer-book.

• Gòej-hegefmlekeâe kesâ Deefleefjkeäle keâesF& DevÙe Meerš veneR efceuesieer~ Dele: DeeJeMÙekeâleevegmeej ner efueKeW Deewj efueKee Gòej ve keâešW~

Except answer-book, no extra sheet will be given.

Write to the point and do not strike the written

answer.

• hejer#eeLeea Dehevee jesue veb0 ØeMve-he$e hej DeJeMÙe efueKeW~

Candidates must write their Roll Number on the

question paper.

• ke=âheÙee ØeMveeW keâe Gòej osves mes hetJe& Ùen megefveefMÛele keâj ueW efkeâ ØeMve-he$e hetCe& Je mener nw, h ejer# ee ke s â Gh ejevle Fme mecy evOe ceW k eâesF& Yeer oe Jee mJe erkeâ ej veneR efk eâÙe e p eeÙe siee~

Before answering the questions, ensure that you

have been supplied the correct and complete

question-paper, no claim in this regard, will be

entertained after examination.

mee ceevÙe efveoxMe :

(i) meYeer heÇMve Deefve JeeÙ e& nQ~

(ii) ØeMve-he$e ceW kegâue 18 ØeMve nQ~

( 3 ) 3028/ (Set : B)

3028/ (Set : B) P. T. O.

(iii) ØeMve mebKÙee 1 ceW 1-1 DebkeâeW kesâ y eejn (i-xii) yengefJekeâuheerÙe

ØeMve nQ~ ØelÙeskeâ ØeMve kesâ Ûeej mebYeeefJele Gòej nQ~ FveceW mes

me Jeexòec e Gòej Deheveer Gòej hegefmlekeâe cebs efueefKeS~

(iv) ØeMve mebKÙee 2 mes 10 lekeâ DeefleueIeg GòejerÙe ØeMve nQ leLee

ØelÙeskeâ ØeMve 2 DekeâeW keâe nw~

(v) ØeMve mebKÙee 11 mes 15 lekeâ ueIeg GòejerÙe ØeMve nQ leLee ØelÙeskeâ

ØeMve 3 DebkeâeW keâe nw~

(vi) ØeMve mebKÙee 16 mes 18 lekeâ oerIe& GòejerÙe ØeMve nQ leLee ØelÙeskeâ

ØeMve 5 DebkeâeW keâe nw~

(vii) ØeMve-he$e ceW mece«e ™he mes keâesF& efJekeâuhe veneR nw~ leLeeefle, 5

DebkeâeW Jeeues leerveeW ØeMveeW ceW Deebleefjkeâ ÛeÙeve Øeoeve efkeâÙee ieÙee nw~

Ssmes ØeMveeW ceW mes Deehekeâes efoS ieS ÛeÙeve ceW mes kesâJeue Skeâ ner

ØeMve keâjvee nw~

(viii) kewâukeäÙeguesšj kesâ GheÙeesie keâer Devegceefle veneR nw~ DeeJeMÙekeâ nesves hej,

ueIegieCekeâerÙe meejefCeÙeeW keâe ØeÙeesie efkeâÙee pee mekeâlee nw~

General Instructions :

(i) All questions are compulsory.

(ii) There are 18 questions in all.

(4) 3028/ (Set : B)

3028/ (Set : B)

(iii) Question Number 1 consists of twelve (i-xii)

multiple choice type questions each of 1

marks. Each question has four possible

answers. You have to select best answer out

of these and write your choice in your

answer-book.

(iv) Question numbers 2 to 10 are very short

answer type questions and carry 2 marks

each.

(v) Question Numbers 11 to 15 are short

answer type questions and carry 3 marks

each.

(vi) Question numbers 16 to 18 are long answer

type and carry 5 marks each.

(vii) There is no overall choice. However, an

internal choice has been provided in all three

questions of 5 marks each. You have to

attempt only one of the given choice in such

questions.

(viii) Use of calculators is not permitted. If

required, you may use logarithmic tables.

( 5 ) 3028/ (Set : B)

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1. (i) efkeâmeer 0.25 ceer0 heâeskeâue otjer kesâ ueWme keâer #ecelee nesieer : 1

(A) 0.25 D (B) + 4 D

(C) + 1 D (D) + 2.5 D

The power of a lens of focal length 0.25 m is :

(A) 0.25 D (B) + 4 D

(C) + 1 D (D) + 2.5 D

(ii) FvõOeveg<e efvecve ceW mes efkeâme Ieškeâ kesâ keâejCe yevelee nw ? 1

(A) efJeJele&ve

(B) hejeJele&ve

(C) hejeJele&ve SJeb efJeJele&ve

(D) DeheJele&ve SJeb hetCe& Deebleefjkeâ hejeJele&ve

A rainbow is formed due to which of the following ?

(A) Diffraction

(B) Reflection

(C) Reflection and diffraction

(D) Refraction and total internal reflection

(6) 3028/ (Set : B)

3028/ (Set : B)

(iii) efvecve ceW mes keâewve-mee mener ohe&Ce met$e nw ? 1

(A) uvf

111−= (B) uvf +=

(C) f

1 = v + u (D)

uvf

111+=

Which of the following represents correct

mirror formula ?

(A) uvf

111−= (B) uvf +=

(C) f

1 = v + u (D)

uvf

111+=

(iv) efvecve ceW mes efkeâmekesâ efueS efvejesOeer efJeYeJe DeefOekeâ nesiee ? 1

(A) ueeue (B) yewbieveer

(C) veeruee (D) heeruee

For which of the following the stopping

potential is maximum ?

(A) Red (B) Violet

(C) Blue (D) Yellow

( 7 ) 3028/ (Set : B)

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(v) Skeâ m mebefnle SJeb v Jesie kesâ keâCe kesâ efueS os-yeÇe@iueer lejie-owIÙe& keâe ceeve nesiee : 1

(A) mv (B) h

mv

(C) mv

h (D) hmv

De-Broglie wavelength associated with a particle of mass m, moving with velocity v is

given by :

(A) mv (B) h

mv

(C) mv

h (D) hmv

(vi) efvecve veeefYekeâerÙe DeefYeef›eâÙee ceW X keâe ceeve nesiee : 1

1

11

2

1

2

1HHHH

X+→+

(A) 1 (B) 2

(C) 3 (D) 4

Give the value of X in the following nuclear

reaction :

1

11

2

1

2

1HHHH

X+→+

(A) 1 (B) 2

(C) 3 (D) 4

(8) 3028/ (Set : B)

3028/ (Set : B)

(vii) neF[espeve hejceeCeg kesâ efueS keâewve-meer ßesCeer ÂMÙe ØekeâeMe ceWs nesleer nw ? 1

(A) heeMeve (B) yeecej

(C) ueeFcesve (D) heerhebâ[

Which of the following series of H-atom lies

in visible range ?

(A) Paschen (B) Balmer

(C) Lymen (D) Pfund

(viii) efmeefuekeâe@ve ceW Fvedef[Ùece efceueeves hej keâewve-mee DeOe&Ûeeuekeâ yevelee nw ? 1

(A) N (B) P

(C) oesveesb (D) keâesF& veneR

What type of Semiconductor is obtained by doping Indium with Silicon ?

(A) N (B) P

(C) Both (D) None

(ix) JeeÙegceb[ue keâer efkeâme melen mes jsef[Ùees lejbiesb hejeJeefle&le nesleer nQ ? 1

(A) #eesYe ceb[ue (B) meceleehe ceb[ue

(C) DeeÙeve ceb[ue (D) keâesF& venerb

( 9 ) 3028/ (Set : B)

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Which layer of atmosphere reflects radio waves ?

(A) Chromosphere (B) Mesosphere

(C) Ionosphere (D) None

(x) Skeâ h TBÛeeF& kesâ TV šeJej mes DeefOekeâlece efkeâleveer otjer lekeâ ØemeejCe efkeâÙee pee mekeâlee nw ? Ùeefo he=LJeer keâer ef$epÙee R nw : 1

(A) Rh (B) hR/

(C) Rh2 (D) keâesF& veneR

The maximum distance to which transmission can be made by a TV tower at height h is given by (Given R is radius of

earth) :

(A) Rh (B) hR/

(C) Rh2 (D) None

(xi) Skeâ JewÅegle-ÛegcyekeâerÙe lejbie keâer DeeJe=efòe 10 MHz nes, lees lejbie- owIÙe& nesieer : 1

(A) 10 ceer0 (B) 3 ceer0

(C) 300 ceer0 (D) 30 ceer0

(10) 3028/ (Set : B)

3028/ (Set : B)

The frequency of an electromagnetic wave is

10 MHz. What is its wavelength ?

(A) 10 m (B) 3 m

(C) 300 m (D) 30 m

(xii)efvecve ceW mes efkeâme efJeÅegled-ÛegcyekeâerÙe efJeefkeâjCe keâer lejbie-owIÙe& DeefOekeâ nw ? 1

(A) X-efkeâjCeW (B) hejeyeQieveer efkeâjCeW

(C) met#ce lejbiesb (D) jsef[Ùees lejbiesb

Which of the following electromagnetic

radiation has largest wavelength ?

(A) X–rays (B) UV- rays

(C) Microwaves (D) Radio waves

2. ØekeâeMe-efJeÅegled Glmepe&ve keäÙee neslee nw ? JeCe&ve keâjsb~ 2

What is photo-electric emission ? Explain.

( 11 ) 3028/ (Set : B)

3028/ (Set : B) P. T. O.

3. veeefYekeâerÙe mebueÙeve DeefYeef›eâÙee keâe GoenjCe oskeâj JeCe&ve keâjs~ 2

Explain nuclear fusion reaction with an example.

4. Skeâ OR Éej kesâ efueS Øeleerkeâ SJeb melÙeceeve meejCeer yeveeSB~ 2

Draw symbol and truth table for OR gate.

5. P- Øekeâej kesâ DeOe&Ûeeuekeâ efkeâme lejn yeveeS peeles nwb ? 2

How P-type semi-conductor is formed ?

6. Skeâ GYeÙeefve‰ Glmepe&keâ ØeJeOe&keâ ceW Oeeje Øeeefhle keâer heefjYee<ee efueKesb~ 2

Define current gain in C-E amplifier.

7. Skeâ šebm[Ÿetmej keâe GheÙeesie yeleeSB~ 2

What is the use of Transducer ?

8. JewÅegle-ÛegcyekeâerÙe lejbiesb keäÙee nesleer nwb ? met#ce lejbieesb kesâ oes GheÙeesie efueKeW~2

What are electromagnetic waves ? Write two

uses of microwaves.

(12) 3028/ (Set : B)

3028/ (Set : B)

9. Skeâ ohe&Ce kesâ efueS heâeskeâue otjer keâer heefjYee<ee efueKebs leLee 20 mesceer

Je›eâlee ef$epÙee kesâ efueS heâeskeâue otjer %eele keâjsb~ 2

Define focal length for a mirror and calculate

focal length of a mirror having radius of

curvature 20 cm.

10. ØekeâeMe keâe ØekeâerCe&ve keäÙee neslee nw ? 2

What is scattering of light ?

11. cee[gueve keäÙee neslee nw ? DeeJe=efòe cee[gueve keâe efÛe$e yeveekeâj JeCe&ve keâjsb~ 3

What is modulation ? Explain frequency

modulation with the help of a diagram.

12. Skeâ efo°keâejer keäÙee neslee nw ? P-N [eÙees[ keâe DeOe&-lejbie efo°keâejer kesâ ™he ceW JeCe&ve keâjbs~ 3

What is a rectifier ? Explain the working of P-N

diode as half wave rectifier.

( 13 ) 3028/ (Set : B)

3028/ (Set : B) P. T. O.

13. Ùeefo efkeâmeer 2.5 eV keâeÙe&heâueve kesâ heoeLe& hej ØekeâeMe [eueves mes 0.50 V efvejesOeer efJeYeJe keâer pe™jle nesleer nw, lees Deeheeflele ØekeâeMe keâer lejbie-owIÙe& %eele keâjsb~ 3

Calculate the wavelength of light incident on a

material of work function 2.5 eV, if stopping

potential is 0.50 V.

14. OegÇefJele-ØekeâeMe keäÙee neslee nw ? ØekeâerCe&ve kesâ keâejCe OeÇgJeCe keâe JeCe&ve keâjsb~ 3

What is polarization of light ? Explain polarization

by scattering.

15. Ùebie kesâ ØeÙeesie ceW Ùeefo heox keâes 1.0 ceer0 keâer otjer hej jKee ieÙee nw leLee efPeefjÙeeW kesâ yeerÛe keâer otjer 0.5 efceceer nw, lees 600 nm lejbie-owIÙe& kesâ ØekeâeMe kesâ efueS eføebâpe keâer ÛeewÌ[eF& %eele keâjbs~ 3

Calculate fringe width in Young's experiment, if screen is placed at 1.0 m distance from the slits separated by 0.5 mm and wavelength of light used is 600 nm.

16. jsef[ÙeesSsefkeäšJe heoeLe& kesâ efueS DeOee&Ùeg leLee #eÙe efmLejebkeâ keâe JeCe&ve keâjbs

SJeb mecyevOe efueKebs~ 5

Explain the ferms : Half life period and decay

constant for radioactive element and write relation

between them.

(14) 3028/ (Set : B)

3028/ (Set : B)

DeLeJee

OR

jsef[ÙeesSsefkeäšJe #eÙe kesâ efueS efveÙeceeW keâe JeCe&ve keâjsb leLee Fmekeâe meceerkeâjCe efueKesb~

Explain the laws of radioactive decay and write

equation of radioactive decay.

17. heefjheLe efÛe$e keâer meneÙelee mes Skeâ N-P-N š^ebefpemšj keâe ØeJeOe&keâ kesâ

™he ceW JeCe&ve keâjsb leLee Meefkeäle-ueeYe keâe met$e efueKebs~ 5

Explain the working of a N-P-N transistor as an

amplifier with a circuit diagram and give relation

for its power gain.

DeLeJee

OR

Skeâ oesefue$e keäÙee neslee nw ? Skeâ šebefpemšj oesefue$e keâe heefjheLe efÛe$e yeveeSB~

What is an oscillator ? Draw the circuit diagram

of a transistor as an oscillator.

( 15 ) 3028/ (Set : B)

3028/ (Set : B) P. T. O.

18. Skeâ KeieesueerÙe otjyeerve keâe veeceebefkeâle jsKeeefÛe$e yeveeSB leLee Fmekesâ

DeeJeOe&ve #ecelee keâe JÙebpekeâ (met$e) Øeehle keâjW~ 5

Draw a labelled diagram of an astronomical

telescope and derive expression for its

magnifying power.

DeLeJee

OR

ØekeâeMe-efJeJele&ve kesâ efueS Skeâue efPejer ØeÙeesie keâe JeCe&ve keâjsb~

Explain single slit experiment for diffraction of

light.

ssss